Lady Gaga is 40! The Grammy winner is celebrating her milestone birthday on March 28, 2026, and will be on the road, as she heads to Boston, Massachusetts, for March 29 and March 30 performances of her Mayhem Ball Tour. From her go-go dancing beginnings to her infamous meat dress and dozens of awards, Us Weekly broke down some fun facts about the "Abracadabra" singer in our latest issue, on newsstands now. Keep scrolling for 25 Things You Don't Know About Lady Gaga: Lady Gaga Walks Away With 2 Awards at 2026 Grammys: 'I Need to Pinch Myself' 1.